convert GPLv2 license to SPDX

This is part of https://fedoraproject.org/wiki/Changes/SPDX_Licenses_Phase_4

python-pygiftiio.spec

@@ -16,10 +16,11 @@ Initiative (NIfTI).}
 
 Name:           python-%{srcname}
 Version:        1.0.4
-Release:        22%{?dist}
+Release:        23%{?dist}
 Summary:        Python bindings for Gifti
 
-License:        GPLv2
+# Automatically converted from old format: GPLv2 - review is highly recommended.
+License:        GPL-2.0-only
 URL:            https://www.nitrc.org/frs/?group_id=75
 Source0:        https://www.nitrc.org/frs/download.php/1285/%{srcname}-%{version}.tar.gz
 Source1:        https://www.nitrc.org/frs/download.php/261/gifti_write_example.py
@@ -86,6 +87,9 @@ install -D -m 0644 %{srcname}.py -t %{buildroot}/%{python2_sitelib}/
 %{python3_sitelib}/__pycache__/%{srcname}.cpython-3*.pyc
 
 %changelog
+* Mon Jul 29 2024 Miroslav Suchý <msuchy@redhat.com> - 1.0.4-23
+- convert license to SPDX
+
 * Fri Jul 19 2024 Fedora Release Engineering <releng@fedoraproject.org> - 1.0.4-22
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild